Количество вещества. Моль. Молярная масса
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![Стрихнин: Крысиный яд как лекарство - [История Медицины]](https://sun9-54.userapi.com/3u05m8CCJsGRGlaozh-qOvmpwVqr2mknqvyzkw/kau7Wv5w-cw.jpg)
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